title: Solvothermal synthesis of well-dispersed NaMgF3 nanocrystals and their optical properties.
abstract: Complex metal fluoride NaMgF(3) nanocrystals were successfully synthesized via a solvothermal method at a relatively low temperature with the presence of oleic acid, and characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), Fourier transform infrared (FT-IR) spectra, photoluminescence (PL) excitation and emission spectra, respectively. In the synthetic process, oleic acid as a surfactant played a crucial role in confining the growth and solubility of the NaMgF(3) nanocrystals. The as-prepared NaMgF(3) nanocrystals have quasi-spherical shape with a narrow distribution. A possible formation mechanism of the nanocrystals was proposed based on the effect of oleic acid. The as-prepared NaMgF(3) nanocrystals are highly crystalline and well-dispersed in cyclohexane to form stable and clear colloidal solutions, which demonstrate a strong emission band centered at 400 nm in photoluminescence (PL) spectra compared with the cyclohexane solvent. The PL properties of the colloidal solutions of the as-prepared nanocrystals can be ascribed to the trap states of surface defects.
authors.affiliation: State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, People's Republic of China.
authors.forename: Xiaoming
authors.initials: X
authors.lastname: Zhang
authors.forename: Zewei
authors.initials: Z
authors.lastname: Quan
authors.forename: Jun
authors.initials: J
authors.lastname: Yang
authors.forename: Piaoping
authors.initials: P
authors.lastname: Yang
authors.forename: Hongzhou
authors.initials: H
authors.lastname: Lian
authors.forename: Jun
authors.initials: J
authors.lastname: Lin